Michael W. Wallace is COO at Spok Holdings, Inc (SPOK). They have made 15 open-market trades across 1 company since 2020, most recently 2026-03-04.
CIK 0001070123
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
7 open-market purchases totalling $140K since 2020, against 8 sales. Across 7 scored buys the stock is up 10.6% at ninety days, and 7.0 points ahead of the S&P over the same stretch.
7 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| SPOK | 74,034 | $784K |
Shares reported on the most recent Form 4, priced at the 2026-03-04 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 29% | 71% | 71% |
| Avg Move | -0.4% | +6.4% | +10.6% |
| Alpha | +3.1% | +6.6% | +7.0% |
| Scored | 7 | 7 | 7 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SPOK | SELL | 2025-08-25 | 2025-08-26 | $17.87 | $386K | -3.2% | -3.3% | -28.6% |
| SPOK | SELL | 2025-08-04 | 2025-08-05 | $18.49 | $370K | +0.2% | -1.4% | -24.3% |
| SPOK | SELL | 2025-05-07 | 2025-05-08 | $16.53 | $99K | +0.7% | -0.1% | +10.9% |
| SPOK | SELL | 2025-03-04 | 2025-03-05 | $16.53 | $165K | -2.9% | -4.4% | -1.2% |
| SPOK | SELL | 2024-11-19 | 2024-11-20 | $15.95 | $191K | +4.0% | +0.3% | +8.1% |
| SPOK | SELL | 2024-08-20 | 2024-08-21 | $14.80 | $370K | -0.4% | +2.8% | +7.9% |
| SPOK | SELL | 2024-03-01 | 2024-03-04 | $17.24 | $1.4M | -3.9% | -9.1% | -15.5% |
| SPOK | SELL | 2023-12-01 | 2023-12-05 | $16.64 | $333K | -3.7% | +1.1% | +18.1% |
| SPOK | BUY | 2023-03-08 | 2023-03-08 | $10.25 | $26K | -6.4% | +15.7% | +21.7% |
| SPOK | BUY | 2022-12-06 | 2022-12-06 | $7.76 | $16K | -0.4% | +5.7% | +33.9% |
| SPOK | BUY | 2022-08-19 | 2022-08-22 | $7.14 | $12K | +0.0% | -0.1% | +14.6% |
| SPOK | BUY | 2022-05-03 | 2022-05-03 | $7.19 | $17K | -1.9% | -1.5% | -6.3% |
| SPOK | BUY | 2020-11-30 | 2020-12-01 | $9.81 | $20K | +2.6% | +14.0% | +11.4% |
| SPOK | BUY | 2020-08-03 | 2020-08-03 | $10.06 | $30K | +5.6% | +5.6% | -8.9% |
| SPOK | BUY | 2020-03-09 | 2020-03-09 | $10.01 | $20K | -2.1% | +5.4% | +7.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.